Yongtao Zhao Junhui Dong Yonglin Ma Liping Zhao Xiaobing Pei
材料科学技术（英文）
The purpose of this study is to discuss the microstructure and properties variation of the weld metal in the dissimilar stainless steels during the argon tungsten-arc welding process. Because of the existence of different materials and chemistry variation within welds, properties, such as tensile and fracture properties and so on, are expected to show spatial variation. In the study, microstructures were observed by optical and electron microscopy. Good appearance and uniform structure and typical dendrite structure were observed in welding joint. The micro-hardness tester and electronic universal stretcher were used to measure the mechanical properties of the weldments and base metals. The heat affected zone (HAZ) near 1Cr13 hardness is up to peak value of 1150 HV, the strength of weldments is nearly same as austenite stainless steel. In addition,
through seawater immersion test, polarization curves and AC impedance spectroscopy of the weldments and base metals are obtained. It was found that corrosion resistance at welding joint lies between 1C13 and 1Cr18Ni9Ti.
关键词:
1Cr13
,
1Cr18Ni9Ti
,
welding joint
,
mechanical and galvano－chemistry
徐宇
,
徐荣军
,
陈家昶
,
范正洁
,
李成斌
,
王恩刚
连铸
doi:10.13228/j.boyuan.issn1005-4006.20140147
实验研究了旋转电磁搅拌对1Cr13不锈钢铸态组织的影响.结果表明:无电磁搅拌时,铸锭的凝固组织以柱状晶为主,在中心部位形成晶间搭桥,且存在中心缩孔、疏松缺陷;合理的电磁搅拌参数能促进凝固补缩,实验条件下,在铸锭浇注完成90 s后,施加电流为250A,频率为12 Hz,持续时间为60 s的旋转电磁搅拌能促进凝固补缩,提高铸锭的等轴晶率,显著提高铸锭的质量;电磁搅拌使C、Cr元素分布得更均匀,偏析程度减小.
关键词:
1Cr13
,
电磁搅拌
,
凝固补缩
,
温度梯度
王兰芳
,
王旭
,
张俊善
,
邹龙江
机械工程材料
doi:10.3969/j.issn.1000-3738.2008.03.006
采用浸没法分别研究了0Cr18Ni9、1Cr13和1Cr17三种不锈钢材料在700℃LiCl-5%Li2O(质量分数)熔融盐中的腐蚀行为.结果表明:0Cr18Ni9和1Cr13不锈钢的腐蚀产物主要为LiFeO2和LiCrO2,1Cr17的腐蚀产物主要由LiFeO2、LiFe5O8和LiCrO2组成;三种钢的腐蚀速率均随时间的延长而增大,并且1Cr13的腐蚀速率明显大于1Cr17和0Cr18Ni9的;在试验条件下,1Cr17铁素体钢和0Cr18Ni9奥氏体钢的耐蚀性能相当,均优于1Cr13马氏体钢.
关键词:
0Cr18Ni9
,
1Cr13
,
1Cr17
,
LiCl-5％Li2O
,
熔盐腐蚀
